Added multiscreen support

Untested, but I think it might work.  Code from stackexchange.

README.md

@@ -15,18 +15,21 @@ http://en.wikipedia.org/wiki/Astronomy_Picture_of_the_Day
 http://apod.nasa.gov/apod/astropix.html
 
 Tested on, OSX 10.7.4
-During testing, it just sets the background for the space the terminal is on when it is run.  I have no idea how this will interact with cron.  I'll find out over the next few days.
+During testing, it just sets the backgroud for the space you happen to be on at 6AM, or when the computer unsleeps next.
+
 
 Development:
 =====
-I just modified it to work on OSX, and Commented out the use of PIL and the resizing of the image, as OSX can deal with that itself.
+I just modified it to work on OSX, and commented out the use of PIL and the resizing of the image, as OSX can deal with that itself.
+Now I've learned how to set a up a launchd plist file to make it run once a day.
 
 
 Installation:
 =====
 * Place the file wherever you like and chmod +x it to make it executable
 * Set the defaults in the file 
-* Edit cron.txt to properly reference the file, and adjust the time at which it runs if you want.  (First number is minutes, next is hours.)
+* Move net.belaire.nasa_apod_desktop.plist to ~/Library/LaunchAgents
+* Run 'launchdctl load ~/Library/LaunchAgents/net.belaire.nasa_apod_desktop.plist'.
 
 To Do:
 =====

nasa_apod_desktop.py

@@ -44,23 +44,12 @@
 
 INSTALLATION
 Ensure you have Python installed, which is required for OSX.
-
-Set your resolution variables and your download path (make sure it's writeable):
+Edit the plist file to have the proper path to the python script.
+Move the plist file into ~/Library/LaunchAgents/ folder.
+Edit the following path to somewhere on your computer that is writable.
 '''
 DOWNLOAD_PATH = '/Users/theobelaire/backgrounds/'
-''' 
-
-RUN AT STARTUP
-To have this run whenever you startup your computer, perform the following steps:
-1) Click on the settings button (cog in top right)
-2) Select "Startup Applications..."
-3) Click the "Add" button
-4) Enter the following:
-Name: NASA APOD Desktop
-Command: python /path/to/nasa_apod_desktop.py
-Comment: Downloads the latest NASA APOD and sets it as the background.
-5) Click on the "Add" button
-'''
+
 import commands
 import urllib
 import urllib2
@@ -69,7 +58,7 @@
 #from PIL import Image
 from sys import stdout
 
-from appscript import app, mactypes
+from appscript import app, mactypes, its
 
 
 # Configurable settings:
@@ -149,6 +138,15 @@ def set_OSX_wallpaper(file_path):
         print "Setting the wallpaper"
     app('Finder').desktop_picture.set(mactypes.File(file_path))
 
+def set_all_OSX_wallpapers(file_path):
+    ''' Sets the new image as the wallpaper for all moniters.  Untested. If someone want to ship me a moniter I'd be happy to test it though... '''
+
+    se = app('System Events')
+    desktops = se.desktops.display_name.get()
+    for d in desktops:
+        desk = se.desktops[its.display_name == d]
+        desk.picture.set(mactypes.File(file_path))
+
 
 def print_download_status(block_count, block_size, total_size):
     written_size = human_readable_size(block_count * block_size)